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1·They wash dishes by turns.

他们轮流洗碗碟。

2·The book is, by turns , funny and very sad.

这部书时而妙趣横生，时而悲悲戚戚。《牛津词典》

3·Mary and Jane rode by turns .

玛丽与珍尼轮流骑。

4·He grew pale and red by turns.

他的脸一会儿红一会儿白。

5·She went hot and cold by turns.

她一阵发热，一阵发冷。

6·Mary and Jane rode by turns.

玛丽与简轮流骑。

7·I was hot and cold by turns.

我一会儿热，一会儿冷。

8·We clean the blackboard by turns.

我们轮流擦黑板。

9·To do or execute by turns.

轮流做，轮流进行。

10·We did the work by turns.

我们轮流做这项工作。